Mechanism for stamping machines



G.'w. HEENE MECHANISM FOR STAMPING MACHINES Dec. 8, 1931.

Filed Feb. 13, 1929 ml f.

Vf llll @Il ATTORN EYS Patented Dec. 8, 1931 GEOPtGIEIV W, HEENE, OFCLEVELAND, OHIO riEcnANrsM non sTAivrPING MACHINES Application iledFebruary 13, 1929. Serial No.k339,687.

In stamping machines adapted to impress a name or emblem on a blank, itis customary to use a hammer or like member to strike a die by which theimpression is made. Continued use of theV impressions or marks madethereby became less distinct and clear unless the intensity of the blowdelivered by the hamio mer was increased or the dies were replaced.

Replacement of the dies every time they became slightly wornnecessitated frequent and unnecessary dismembering of the machine.

One object of my invention, therefore, is to provide means associatedwith the ham'- mer of a stamping machine, whereby the hammer can be madeto deliver blows of dif-V ferent intensity. l

A further object of my invention is to place the intensity varying meansin an easilyaccessible position so that adjustment can be made withoutdisassembling the rest of the machine.

To be more specific, I provide a cam with a plurality of protrudingpoints of diiferent lengths, the cam being rotatably mounted to bringdifferent points into contact with the hammer raising means. In thismanner, as the die becomes worn, I propose to rotate the cam so that alonger point will engage the hammer raising means, thereby lifting thehammer to a higher position before it is released, whereby a. blow ofgreater force will be delivered to the dies.

Another object of my invention is to provide a hammer of inexpensive andlsimple construction which is adapted to strike the dies a great numberof blows without becoming worn or broken.

To be more specific, I construct my hammer of an iron casting and' imbedtherein a blow receiving portion of hardened materiali By such aconstruction, the blow receiving means is adapted to withstandconsiderable shock while the remainder of the hammer is made from a lessexpensive material and in a simple manner. j

Various other objects and advantageswill i in part become apparent andin part be herethe machine brought about a condition wherein the diesbecame worn and j of springs,

inafter set forth as the description'of the invention proceeds.

For a'full and more complete understanding thereof, reference may be hadto the following description and accompanying'drawings, in which:

- Figure 1 is a side elevation of my stamping machine 'with the partsbroken away and showing the application of this invention.`

Figure 2 is a detail view in perspective showing an embodiment of myinvention.

Figure 3 is a detail view with parts in section, and clearly shows themanner of mounting the cam and blow receiving means.

W'hile a specic embodiment of my invention is herein set forth, it isunderstood that I am not'to be limited by the exact construct-iondescribed because various modifications of these details may be providedin putting the invention into practice within the purview of theappended claims.

Throughout the various. figures of the drawings, like referencecharacters denote corresponding parts. Y

A stamping machine adapted to stamp -a name or emblem on a piece ofmetal has a frame A upon which is carried supports l.A

Also carried by the frame and rotatably connected thereto is a carrierin which are mounted dies 2. The dies 2 are pivotally secured at theirinner ends, while their outer ends are held in a` raised position bymeans (not shown), these springs beingdisposed between the dies and thedie carry-1` ing member. Suitable means for rotating the die carryingmember are also provided and carried by the upper portions of the sup`ports l.

'A magazine for carrying metal `discs is shown at 3V and comprises thetubular-por tion t and base member 5, the base member beine' adapted torest on the frame A. A member 6 rigidly fastened to the frame A by thescrews 7, has a cam 8 pivotally mounted thereto at 9, the cam 8 beingadapted to clamp the base member 5 of the magazine 3 to the frame A Theoperation of the cam 8 is the subject of a separate invention and isfully brou ht out in my Patent No. 1,738,- 899, granted ec. l0, 1929.

vally connected to a A metal disc upon which is to be stamped a name oremblem is supported by the member 10, which'is provided with the ratchet11 for consecutively turning the member through small angles as the nameor emblem is stamped on the aforementioned disc.

A A'hammer generally denoted as 12 is pivotstationaryV part (not shown)of the frame for vertical swinging movement. lI`he operative end of thehammer is provided with a weight 13 formed'in- Vtegrally therewith. `Arotatably adjustable cam member in the form of a lug 17, havingperipheral contact faces 18, 19 and 2O at different distances form itsaXisof rotation,

is aliixed to the hammer 12 by means of a pin 15 integral with the cam17 and extending into arecess 14 of the said hammer12. A

A screw 16 also carried'by the hammer 12 and cooperating with screwthreads therein, is adapted to abut against the pin 14, therebypreventing the cam 17 from rotating.

The under face or striking portion of the hammer 12 has a recess 21therein into which o is inserted a striker 22 of hardened material.

The striker 22 is held in of a pin 26. A

A means 23 for raising the hammer 12 is pivoted to the frame (not shown)and has place by means O an end member 24 pivoted to the means 23 atY25. The end member 24 is so constructed that it is allowed to swingupwardly from the position as shown in Figure 1, but it is not allowedto swing below that position.

- In theV operation of a machine of this type, the raising means 23 iscaused to pivot about its outer end (not shown). The end member y24 thenengages one of the points of the lug 17 thereby lifting the hammer 12.

Since the hammer 12 is also pivoted, the lug will describe an arc as itascends, and a point will be reached where the cam 17 will disengage,thereby allowing the hammer 12 to descendunder gravity action and strikethe die which is below it. Then the member 28 is returned to itsoriginal position. When the dies become worn, the cam 17 is rotated sothat one of the points-19 or 20 will be.

downwardly disposed. Since these points are longer than the point 18,the end member 24 will contact sooner with the points 19 or 20 yon itsupward movement,.thereby raising the hammer to a higher position thanbefore, and giving the hammer a greater distance to kfall which, ofcourse, will increase the force of the blow.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent of the UnitedStates, .is

1. In a stamping machine of the class described, the combination with ahammer, of means associated therewith for varying the intensity ofimpact thereof, said means in.- cluding a rotatably adjustable cammember carried by the hamme i 2. A stamping machine of the classdescribed, comprising, in combination, a hammer member, means associatedtherewith for varying the intensity of impact thereof, said meansincluding a rotatably adjustable cam member carried by the hammermember, and means for engaging said cam member to actuate said hammer.

3. Ina stamping machine of the class described, the combination with agravity operated hammer member, of means associated therewith forvarying the intensity of impact thereof, said means including a cammember, carried vby the hammer, said cam member havinga plurality of camsurfaces thereon, and means'adapted to selectively enga-ge said camsurfacesl to'actuate said hammer. y 4. In a stamping machine of theclass described, -the combination with a hammer member, ofmeansvassociated therewith for varyingthe intensity of impact thereof,said means including a rotatably adjustable cam member, said cam memberhaving a plurality of cam surfaces thereon, said surfaces beingpositioned at different distances from the axis of rotation of thecam-member- 5. In a device of the class described, the combination witha gravity operated hammer member, an d operating means for raising thehammer member and releasing the same, of a cam member carried by saidhammer having cam surfaces selectively engageable by said means to raisethe hammer member to different heights and release the same to deliverblows of different intensities. v

G.v In a stamping machine of the class described, the combination with agravity operated hammer member, and operating means for raising thehammer member and releasingthe same, of a cam member having cam surfacesthereon arranged at different dis` tances from its center, said cammember being rotatablyV adjustable in said hammer, said cam member being.adapted torhave said surfaces selectively engageable by said means tovary the height to which the hammer mem'- ber is lifted.

7. In a stamping machine of the class described, a gravity operatedhammer member, an operating membery adapted to engage said hammer memberto raise and release the same to permit said hammer to deliver a blow,and a cam member on one of said members said cam member being adjustableto vary the height to which said hammer member is lifted.

In testimony whereof I aiiizr my signature.

' GEORGE IV. HERNE.

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